腰椎穿刺針

After finding out the landmarks again, the doctor inserts a puncture needle with a needle core at the midline position and the upper edge of the next spinous process. The needle is facing the head, about 15 degrees, which seems to be facing the direction of the patient's umbilicus. CSF leakage can cause post-puncture headaches, and recent data suggest that the use of "pencil-like" needles can reduce the risk of headaches because they allow the fibers of the dural sac to loosen without severing them. If the more commonly used beveled needles are used, the bevel of the needle should be in the sagittal plane, which also allows the fibers parallel to the spinal axis to spread out without severing them.

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